Darbase Darwin union manuscripts catalog
Cambridge University Library DAR 121: 36
Notebook B
B 36
Editorial Symbols: ‹ › = deleted text   « » = interlined text   BOLD = text added

I think


Case must be that one generation then should be as many living as nowa
To do this & to have many species in same genus (as is). REQUIRES extinction.b
Thus between A. & B. immens gap of relation C & B. the finest gradation, B & D rather greater distinction
Thus genera would be formed.— bearing relation

aCase must...now] added in balloon in same brown ink as figure
bTo do this...extinction] added in second balloon in grey ink
Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin
Transcription and apparatus by the Darwin Manuscripts Project © American Museum of Natural History